<! DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>people_info</title>
</head>

<body>
  <h1>{{ book.book_title}}:</h1>

  {% for i in people %}
    <li>人物名称: {{ i.name }}----年龄: {{ i.age }}</li> 
  {% empty %}
    <li>无相关信息</li>
  {% endfor %}
</body>

</html>